Sakkawong, S., P. Kullatam, W. Kumsang, and Y. Chunate. “Guidelines for the Prevention of COVID-19 Transmission from Using Medical Tools and Equipment in Patient Care”. Siriraj Medical Bulletin, vol. 14, no. 1, Jan. 2021, pp. 41-49, https://he02.tci-thaijo.org/index.php/simedbull/article/view/242074.